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COPYRIGHT (c) 1989 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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Scroller subclass:#HorizontalScroller
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Interactors'
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!
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HorizontalScroller comment:'
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COPYRIGHT (c) 1989 by Claus Gittinger
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All Rights Reserved
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the scroller part of a horizontal scrollbar
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$Header: /cvs/stx/stx/libwidg/Attic/HScroller.st,v 1.5 1994-08-07 13:22:36 claus Exp $
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written spring/summer 89 by claus
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'!
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!HorizontalScroller methodsFor:'initialization'!
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initialize
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super initialize.
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moveDirection := #x
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! !
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!HorizontalScroller methodsFor:'accessing'!
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thumbOrigin:newOrigin
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"set the thumbs origin (in percent)"
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|realNewOrigin oldFrame oldLeft oldRight thumbLeft thumbRight
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tH tW delta top|
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((newOrigin + thumbHeight) > 100) ifTrue:[
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realNewOrigin := 100 - thumbHeight
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] ifFalse: [
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realNewOrigin := newOrigin
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].
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(realNewOrigin > 100) ifTrue:[
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realNewOrigin := 100
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] ifFalse: [
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(realNewOrigin < 0) ifTrue:[
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realNewOrigin := 0
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]
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].
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(realNewOrigin = thumbOrigin) ifFalse:[
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thumbOrigin := realNewOrigin.
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shown ifTrue:[
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oldFrame := thumbFrame.
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self computeThumbFrame.
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(thumbHeight = 100) ifTrue:[^ self].
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(thumbFrame ~~ oldFrame) ifTrue:[
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oldFrame isNil ifTrue:[
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self drawThumb.
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^ self
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].
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tH := thumbFrame height.
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tW := thumbFrame width.
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oldLeft := oldFrame left.
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oldRight := oldLeft + tW.
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thumbLeft := thumbFrame left.
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thumbRight := thumbLeft + tW.
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top := thumbFrame top.
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(oldRight >= width) ifTrue:[
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"cannot copy - thumb was behind end"
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self drawThumbBackgroundInX:oldLeft y:top
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width:(width - oldLeft" - 1") height:tH.
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self drawThumb.
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^ self
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].
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self catchExpose.
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self copyFrom:self x:oldLeft y:top
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toX:thumbLeft y:top
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width:tW height:tH.
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oldLeft > thumbLeft ifTrue:[
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delta := oldLeft - thumbLeft.
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oldLeft > thumbRight ifTrue:[
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self drawThumbBackgroundInX:oldLeft y:top
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width:(tW + 1) height:tH
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] ifFalse:[
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self drawThumbBackgroundInX:thumbRight y:top
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width:delta height:tH
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]
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] ifFalse:[
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delta := thumbLeft - oldLeft.
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oldRight < thumbLeft ifTrue:[
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self drawThumbBackgroundInX:oldLeft y:top
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width:tW + 1 height:tH
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] ifFalse:[
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self drawThumbBackgroundInX:oldLeft y:top
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width:delta height:tH
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]
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].
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self waitForExpose
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]
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]
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]
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!
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scrollLeftAction:aBlock
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"ignored -
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but implemented, so that scroller can be used in place of a scrollbar"
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!
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scrollRightAction:aBlock
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"ignored -
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but implemented, so that scroller can be used in place of a scrollbar"
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! !
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